Improve installation script

This is an almost complete rewrite of the installation script, mainly
directed to allow installation of Rally also from unprivileged users,
but also adding a few more options and checks.

More in details, the script now:

* can run as unprivileged user.
* support different database types
* allow to specify custom python binary
* always asks confirmation before doing potentially dangerous actions
  (removing directories or installing software)
* automatically install needed software if run as root
* this script is self-sufficient: it automatically downloads Rally
  from the git if needed
* if interrupted, cleans up the virtualenv and/or the downloaded repository

Co-Authored-By: Antonio Messina <antonio.s.messina@gmail.com>
Co-Authored-By: Sergey Skripnick <sskripnick@mirantis.com>
Change-Id: I574d4fd7cc7c8e71720a6a5ff8db22ee4fd4fc81
Closes-bug: #1393887

Dockerfile

@@ -3,7 +3,10 @@ MAINTAINER Sergey Skripnick <sskripnick@mirantis.com>
 COPY . /tmp/rally
 RUN apt-get update && \
     apt-get -y install git python2.7 bash-completion python-dev libffi-dev \
-                       libxml2-dev libxslt1-dev libssl-dev &&\
+                       libxml2-dev libxslt1-dev libssl-dev libpq-dev wget \
+                       build-essential &&\
+    wget https://raw.github.com/pypa/pip/master/contrib/get-pip.py -O /tmp/pip.py &&\
+    python /tmp/pip.py && rm /tmp/pip.py &&\
     cd /tmp/rally &&\
     ./install_rally.sh &&\
     pip install -r optional-requirements.txt &&\

setup.cfg

@@ -23,10 +23,6 @@ classifier =
 packages =
     rally
 
-data_files =
-    /etc/bash_completion.d =
-        etc/rally.bash_completion
-
 [entry_points]
 console_scripts =
     rally = rally.cmd.main:main

setup.py

@@ -13,7 +13,7 @@
 # implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
+#
 # THIS FILE IS MANAGED BY THE GLOBAL REQUIREMENTS REPO - DO NOT EDIT
 import setuptools
 
@@ -25,6 +25,17 @@ try:
 except ImportError:
     pass
 
+import os
+if os.getuid() == 0:
+    data_files = [
+        ('/etc/bash_completion.d', ['etc/rally.bash_completion']),
+        ]
+else:
+    data_files = [
+        ('etc/bash_completion.d', ['etc/rally.bash_completion']),
+        ]
+
 setuptools.setup(
     setup_requires=['pbr'],
+    data_files=data_files,
     pbr=True)

tests/ci/test_install.sh

@@ -15,9 +15,18 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+env
 
-sudo ./install_rally.sh
+sudo ./install_rally.sh --system --yes
 rally deployment list
 
-sudo ./install_rally.sh
+sudo ./install_rally.sh --system --yes
 rally deployment list
+
+sudo ./install_rally.sh --yes -d /tmp/rallytest_root/
+/tmp/rallytest_root/bin/rally deployment list
+
+sudo rm -fr ~/.rally
+
+./install_rally.sh --yes -d /tmp/rallytest_user
+/tmp/rallytest_user/bin/rally deployment list